Alpha-naphthol


see under .
either of two isomeric hydroxyl derivatives, c 1 0 h 7 oh, of naphthalene (alpha-naphthol or 1-naphthol and beta-naphthol or 2-naphthol) white or yellowish crystals, with a phenolic odor, that darken on exposure to light: used chiefly in dyes, drugs, perfumes, and insecticides.
historical examples

alpha-naphthol for dark reds from primuline, greys from diamine blues, neutral grey, etc.
the dyeing of cotton fabrics franklin beech

practically the only phenol that is used is the beta-naphthol; alpha-naphthol is occasionally used, but not often.
the dyeing of cotton fabrics franklin beech

noun
a white crystalline solid having two isomeric forms, alpha-naphthol, used in dyes, and beta-naphthol, used in dyes and as an antioxidant. formula: c10h7oh

naphthol naph·thol (nāf’thôl’, -thōl’, nāp’-) or naph·tol (-tôl, -tōl)
n.
an organic compound occurring in two isomeric forms, alpha-naphthol and beta-naphthol. also called naphthalenol.
naphthol
(nāf’thôl’, -thōl’, nāp’-)
a poisonous organic compound occurring in two isomeric forms. both isomers are important in the manufacture of dyes, and also in making antiseptics, insecticides, and tanning agents. naphthol consists of a hydroxyl group (oh) attached to naphthalene. chemical formula: c10h8o.

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